Non-overlapping Intervals
Return minimum number of intervals to remove to make rest non-overlapping Intervals touching at a point are non-overlapping: [1,2] and [2,3] Example: [[1,2],[2,3],[3,4],[1,3]] => 1 (remove [1,3])
Non-overlapping Intervals is a dynamic programming question: define the state cleanly and the transitions usually follow. Interviewers love it because it reveals your state-and-transition thinking and your edge-case discipline. The trap is picking a state that's too vague; keep it minimal and consistent.
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